Flow PHP

ColumnChunk

Properties

$_TSPEC : mixed
$column_index_length : int: Size of ColumnChunk's ColumnIndex, in bytes *.
$column_index_offset : int: File offset of ColumnChunk's ColumnIndex *.
$crypto_metadata : ColumnCryptoMetaData: Crypto metadata of encrypted columns *.
$encrypted_column_metadata : string: Encrypted column metadata for this chunk *.
$file_offset : int: Deprecated: Byte offset in file_path to the ColumnMetaData.
$file_path : string: File where column data is stored. If not set, assumed to be same file as metadata. This path is relative to the current file.
$isValidate : mixed
$meta_data : ColumnMetaData: Column metadata for this chunk. Some writers may also replicate this at the location pointed to by file_path/file_offset.
$offset_index_length : int: Size of ColumnChunk's OffsetIndex, in bytes *.
$offset_index_offset : int: File offset of ColumnChunk's OffsetIndex *.

Methods

__construct() : mixed
getName() : mixed
read() : mixed
write() : mixed

$_TSPEC


    public
    static    mixed
    $_TSPEC
     = [1 => ['var' => 'file_path', 'isRequired' => false, 'type' => \Thrift\Type\TType::STRING], 2 => ['var' => 'file_offset', 'isRequired' => true, 'type' => \Thrift\Type\TType::I64], 3 => ['var' => 'meta_data', 'isRequired' => false, 'type' => \Thrift\Type\TType::STRUCT, 'class' => '\Flow\Parquet\Thrift\ColumnMetaData'], 4 => ['var' => 'offset_index_offset', 'isRequired' => false, 'type' => \Thrift\Type\TType::I64], 5 => ['var' => 'offset_index_length', 'isRequired' => false, 'type' => \Thrift\Type\TType::I32], 6 => ['var' => 'column_index_offset', 'isRequired' => false, 'type' => \Thrift\Type\TType::I64], 7 => ['var' => 'column_index_length', 'isRequired' => false, 'type' => \Thrift\Type\TType::I32], 8 => ['var' => 'crypto_metadata', 'isRequired' => false, 'type' => \Thrift\Type\TType::STRUCT, 'class' => '\Flow\Parquet\Thrift\ColumnCryptoMetaData'], 9 => ['var' => 'encrypted_column_metadata', 'isRequired' => false, 'type' => \Thrift\Type\TType::STRING]]

$column_index_length

Size of ColumnChunk's ColumnIndex, in bytes *.


    public
        int
    $column_index_length

$column_index_offset

File offset of ColumnChunk's ColumnIndex *.


    public
        int
    $column_index_offset

$crypto_metadata

Crypto metadata of encrypted columns *.


    public
        ColumnCryptoMetaData
    $crypto_metadata

$encrypted_column_metadata

Encrypted column metadata for this chunk *.


    public
        string
    $encrypted_column_metadata

$file_offset

Deprecated: Byte offset in file_path to the ColumnMetaData.


    public
        int
    $file_offset
     = 0

Past use of this field has been inconsistent, with some implementations using it to point to the ColumnMetaData and some using it to point to the first page in the column chunk. In many cases, the ColumnMetaData at this location is wrong. This field is now deprecated and should not be used. Writers should set this field to 0 if no ColumnMetaData has been written outside the footer.

$file_path

File where column data is stored. If not set, assumed to be same file as metadata. This path is relative to the current file.


    public
        string
    $file_path

$isValidate


    public
    static    mixed
    $isValidate
     = false

$meta_data

Column metadata for this chunk. Some writers may also replicate this at the location pointed to by file_path/file_offset.


    public
        ColumnMetaData
    $meta_data

Note: while marked as optional, this field is in fact required by most major Parquet implementations. As such, writers MUST populate this field.

$offset_index_length

Size of ColumnChunk's OffsetIndex, in bytes *.


    public
        int
    $offset_index_length

$offset_index_offset

File offset of ColumnChunk's OffsetIndex *.


    public
        int
    $offset_index_offset

__construct()


    public
                    __construct([mixed $vals = null ]) : mixed

Parameters

$vals : mixed = null

getName()


    public
                    getName() : mixed

read()


    public
                    read(mixed $input) : mixed

Parameters

$input : mixed

write()


    public
                    write(mixed $output) : mixed

Parameters

$output : mixed